how to calculate h1ac

The A1C test measures your average blood sugar levels over the past 2-3 months. It is reported as a percentage, and the calculation is based on the amount of glucose attached to hemoglobin in your red blood cells. Here’s how it works:

• A1C Percentage: The A1C test result is given as a percentage. For example, an A1C of 7% means that 7% of your hemoglobin is coated with sugar.

• Estimated Average Glucose (eAG): The A1C percentage can also be converted into an estimated average glucose (eAG) level, which is measured in mg/dL. The formula to convert A1C to eAG is:

  eAG (mg/dL) = 28.7 × A1C - 46.7

  For example, if your A1C is 7%, your eAG would be:

  eAG = 28.7 × 7 - 46.7 = 154 mg/dL

• A1C Ranges:

  • Normal: Below 5.7%
  • Prediabetes: 5.7% to 6.4%
  • Diabetes: 6.5% or above

If you need to calculate your A1C, you can use the formula above or consult your healthcare provider for accurate results.